Ignition control.



C. C. TRUMP.

l IGNITION CONTROL.` APPLICATION HLED nEc.1s. |911.

'Patented Mayzs), 1917 Y wirr/mes: m3

VUNITED STATES PATENT OFFICE.

CHARLES G. TBUMP, OF SYRACUSE, NEW YORK, ASSIGNOR T0 HUMPHREY GAS PUMP COMPANY, A CORPORATION OF NEW YORK.

IGNITION CONTROL.

Application led December 19, 1911.

To all whom t may concern.'

Be it known that I, CHARLES C. TRUMP, a citizen of the United States, residing at Syracuse, in the county of Onondaga, State of New York, have invented a new and useful Ignition Control, of which the following is a specification.

My invention relates to method and means suitable for securing ignition control. My object is to provide improved method and means fer utilizing the flow or impact of liquid in a play pipe or combustion chamber to maintain against a restoring force an open circuit or other desired conditions either electrical or mechanical until the occurrence of a diminution, cessation or re- `Lfersal of said How whereupon said circuit is closed or other previously existing conditions restored. l

Referring to the drawings which illustrate, by way of example, suitable apparatusfor effecting my invention-1 Figure 1 is a diagrammatic sectional view of van internal combustionl pump employing my improved means for ignition control.

Fig.`2 is a vertical section of my inven tion showing an open circuit condition.

Fig. 3 is a similar view showing the circuit closed.

Similar numerals refer to .similar parts throughout the several views.

My invention is especially applicable to internal combustion engines, pumps and compressors of the general type which are now known in the art as the Humphrey pump or compressor.

One of the simplest forms of such pump comprises a combustion and expansion chamber connected with the play pipe and a discharge and also connected with the source of liquid supply. The operation of this deF i vice consists in expanding a compressed combustible charge in an expansion chamber against a column of liquid, thereby driving the liquid from the expansion chamber along the play pipe either to a greater head or pressure. liVhen the momentum of the outward stroke of the liquid is spent, the column returns in the play pipe, in response to the head or pressure to which it'has been driven, liquid iiows back into the combustion chamber to eXpel burnt products and to com ress a fresh combustible char ewhich has een introduced into said cham er.

An' igniter is intended to iire fresh combustible charges in the combustion chamber Specification of Letters Patent.

Patented May 29, 1917.

Serial No. 666,767.

of such a pump as above indicated in continuous operation, at precisely the proper instant of attaining a predetermined condition of volume and pressure in combination. It should serve to ignite the charge at a proper time independently of the quanti tive value of pressure volume or velocity of iiow of liquid7 and this timing should be adjustable to be either retarded or advanced.

Complete compression of the charge absorbs completely the energy of motion of the liquid column and brings it to rest. As the velocity approaches zero value any device which has been displaced by the impact of liquid under velocity will regain from such displacement its equilibrium. If such a device be made to close an electric circuit or otherwise produceignition of the charge when such equilibrium is restored or as it is approached, adjustably, the' charge will be fired on every compression the same point of time with relation'to the end or maximum pressure of compression, without regard to the absolute nvalue of that pressure. As methodA and meansfor producing this desired result I provide a Pitot tube with mercury manometer and adjustable contacts.

Referring to the drawings, `the part of the tube marked 5 contains water. The part marked 6 contains oil. The part marked 7 contains alcohol, while the part marked 8 contains mercury. The contacts 9 and 10 provided with the binding posts 11 and 12 are vertically adjusted through suitable stuffing boxes as indicated. These two contact rods as shown in Fig. V3, are adapted to dip into the legs of the mercury column when said ends are level as shown in Fig. 3. As above stated, upon an expansion of a combustible charge the liquid, forl example,

water,is driven from the combustion chamber press the fresh combustible charge which has been introduced' into said chamber. The impact of the inmoving or rising liquid at the open mouth 16 causes a displacement ofthe mercury 'column from one of the conytacts as: indicated in Fig. 2. As the velocity of the liquid moving upwardly into the eX- pansion chamber is re 'uced to zero crapproaches it, the mercury seeks equilibrium and makes contact With both contacts 9 and -10 With a constant lead or lag, according to the adjustment oi said contacts.

If a constant lead is desirable in. order to compensate for the lag of slow combustion ofthe charges it is only necessary to lower the contacts so that a circuit is completed before the mercury` reaches complete equilibrium. It is obvious vthat in this Way any desired adjustment to meet any required conditions may be secured. That is to say by the proper adjustment of the contact rods 9i and 10, it is possible to provide a completion of the circuit at any desired moment relatively to the pressure conditions of the liquid. For example, the cir cuit may be completed slightly before the liquid comes to rest in its instroke, so that the spark may be secured slightly in 'ad- Vance of the moment of maximum compression or practically simultaneous therewith, or,` by a different adjustment of said rods, it may be provided that the circuit is not completed until after the liquid is compressed; thus the spark is delayed until after the moment of maximum compression.

This range of adjustment makes it possible to secure the desired electrical condition at the moment most suitable to the peculiar conditions which it may be desired to meet.

and permitting the restoring torce to be:

come effective to react upon the, medium upon change of pressure of the liquid.

. 2. The method of utilizing the impact of liquid for controlling, an electric circuit which consists in actuating a medium by said impact, against a restoring force and permitting the restoring force to'become effective toy react uponY the medi-um upon change of pressure of the liquid.

3. Themethod of utilizing the impactl of ,f 6.0.,

liquid to nake and break an electric circuitv which consists in actuating a medium by said impact, against a restoring forcefandl permitting the restoring force to become "elif-` fective to react upon the :medium upon change of pressure of thelliquid. v 7 cHARLEs c. Teun?.

Witnesses:

SYDNEY G. Davies, Y J oHN HAROLD HARPER.

Copies of this patent may be obtained. for five cents each, by addressing. the Commissioner of Patents, Washington, D. C. 

